package com.zhiwu.server.Impl;

import com.zhiwu.properties.MinioProperties;
import com.zhiwu.server.FileService;
import io.minio.*;
import io.minio.errors.*;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
@RequiredArgsConstructor
public class FileServiceImpl implements FileService {

    private final MinioProperties properties;

    private final MinioClient client;

    @Override
    public String uploadFile(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {

        boolean isBucketExists = client.bucketExists(BucketExistsArgs.builder()
                                                                     .bucket(properties.getBucketName())
                                                                     .build());
        if (!isBucketExists) {
            client.makeBucket(MakeBucketArgs.builder()
                                            .bucket(properties.getBucketName())
                                            .build());
            client.setBucketPolicy(SetBucketPolicyArgs.builder()
                                                      .bucket(properties.getBucketName())
                                                      .config(createBucketPolicyConfig(properties.getBucketName()))
                                                      .build());
        }

        String filename = new SimpleDateFormat("yyyyMMdd").format(new Date()) + "/" + UUID.randomUUID() + "-" + file.getOriginalFilename();
        client.putObject(PutObjectArgs.builder()
                                      .bucket(properties.getBucketName())
                                      .object(filename)
                                      .stream(file.getInputStream(), file.getSize(), -1)
                                      .contentType(file.getContentType())
                                      .build());

        return String.join("/", properties.getEndpoint(), properties.getBucketName(), filename);

    }

    private String createBucketPolicyConfig(String bucketName) {

        return """
                {
                  "Statement" : [ {
                    "Action" : "s3:GetObject",
                    "Effect" : "Allow",
                    "Principal" : "*",
                    "Resource" : "arn:aws:s3:::%s/*"
                  } ],
                  "Version" : "2012-10-17"
                }
                """.formatted(bucketName);
    }
}
